Which is the best explanation for why Mesopotamians built canals? O They needed a way to control low water levels.
O They needed a way to control the surplus.
O They needed a hoy to control the river's flow.
They needed a way to control flooding.

I'm pretty sure the answer is number 3

Explanation:

They needed a hoy to control the river's flow

what are the others?

in november 1781, john hanson became the first president of the united states in congress assembled, under the articles of confederation. many people have argued that john hanson, and not george washington, was the first president of the united states, but this is not quite true.

explanation: